MModerator Learn-to-swim butterfly walkthrough from a former competitive swimmer turned coach. She sets out to teach three things: the kick, the double-arm pull and the timing between them, and frames fly as a rhythm stroke with no body rotation, unlike freestyle. Timing is one of the three pillars, not the whole video.
RReviewer Right message for first-timers: fly is about rhythm, not strength, and it is not freestyle with a bigger kick. She promises timing and kick drills, and there is a plug for her swim sets.